// Copyright 2018 The Feed Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.android.libraries.feed.piet.ui;

import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RectShape;
import com.google.search.now.ui.piet.GradientsProto.LinearGradient;

/** Class to display gradients according to the Piet spec (angle + color stops at %ages) */
public class GradientDrawable extends ShapeDrawable {

  // Doesn't like the call to setShape and setShaderFactory
  @SuppressWarnings("initialization")
  public GradientDrawable(LinearGradient gradient) {
    super();

    int[] colors = new int[gradient.getStopsCount()];
    float[] stops = new float[gradient.getStopsCount()];
    for (int i = 0; i < gradient.getStopsCount(); i++) {
      colors[i] = gradient.getStops(i).getColor();
      stops[i] = gradient.getStops(i).getPositionPercent() / 100.0f;
    }
    setShape(new RectShape());
    setShaderFactory(new GradientShader(colors, stops, gradient.getDirectionDeg()));
  }
}
